<?php
echo"计算输入的两个证书加减乘除的结果\n";
echo"输入两个证书，用英文逗号分隔：\n";
fscanf(STDIN,"%d ,%d",$a,$b);
$he=$a+$b;
$cha=$a-$b;
$cheng=$a*$b;
$chu=$a/$b;
echo"$a+$b=$he\n";
echo "$a-$b=$cha\n";
echo"$a*$b=$cheng\n";
echo"$a/$b=$chu\n";
